Mixing-machine.



No. 633,124. Patented Sept. 19, I899.

-W. M. CUMMEB.

MIXING MACHINE.

I (Application and Apr. 8, 1899.! (No Model.) 2 Sheets--Sheet 1.

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N0; 633,]24. Patented Sept. 19, I899.

W. M. CUMMER.

MIXING MACHINE.

(Application filed Apr. 8, 1899. (No Model.) 2 sheetsfsheet 2.

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UNITED STATES PATENT EEicE.

\VILL OUMMER, OF CLEVELAND, OHIO.

MIXING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 633,124, datedSeptember 19, 1899.

Application filed April 8, 1899.

To all whom, it may concern:

Be it known that I, WILL M. CUMMER, a citizen of the United States,residing at Oleveland, in the county of Cuyahoga and State of Ohio, haveinvented certain new and. useful Improvements in Mixing-Machines and Ido declare that the following is a full, clear, and exact description ofthe invention, which will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to mixing-machines such as are used on a largescale or of a large size for mixing asphalt compositions for pavementsand other purposes and generally for mixing plastics and compounds ofvarious kinds requiring thorough incorporation and union of all theelements. It occurs in machines of this kind not only that there isexcessive wear in the moving parts, requiring repair and replacement atdifferent intervals, but when differently-conditioned materials are tobe mixed requiring also different constructions or styles of mixingblades or arms. Obviously also in the case of machines built in thelarge proportions or size of these it is both difficult and inconvenientto handle the mixer shaft and blades and gears in one part or as a wholeto make changes, because they are not only Very heavy, but also veryawkward for handling. Hence I have conceived the idea of building amachine with a sectional shaft having a single removable part and twostationary parts, all substantially as shown and described,andparticularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a plan View of amixing-machine containing my improvement. Fig. 2 is a cross-section online 2 2, Fig. 1, disclosing the invention in two partic ulars,ashereinafter fully described. Fig. 3 is a perspective View of one of theend sections of the shaft, and Fig. 4 is a perspective view of thematching end of the middle or removable section of the shaft.

A represents the casing or hopper of the machine, in which are twocooperating mixershafts, formed each in like sections B B, with blades Oof any suitable kind, according to the material to be mixed, and gears Dand D at opposite ends for jointly rotating the said shafts. As bothshafts are alike, a description of one will suffice for both. Now tocarry out my idea of convenience for exchange of shafts and blades, Ihave made a shaft consisting of three sections, two equal end sections Band one longer middle section B. One of the end sections is shown fullyin Fig. 3, where it is seen to be circular in cross-section to form thebearing part of the shaft and receive a gear-wheel on its end, while theinner end thereof has a head I) with an undercut slightly-taperedmortise or recess b directly across its end, adapted to receive thecorrespondingly-formed tongue or tenon b on'the middle section B". Thistongue has the form, substantially, of a dovetail tenon, except that itis wedge shaped lengthwise, and as the recess 1) is tapered to match thetenon the two when united form a flush and firmly-locked union of theparts,with their shoulders abutting. The same kind of joint is used atboth ends of the section B, and of course the recess 1) and tenon I)might be reversed'as to the shaft-sections Without affecting theinventionthat is, the tenon might be on B and the recess on'B. Nowhaving the shaft united in this way it is bound together and madepractically the same as if it were one solid piece by means of thetwopart flanged heads E, which carry the blades 0, and a cross-sectionof which is seen at the left in Fig. 2. These heads have width or reachenough to completely overlap the joints on both sides, and then byfastening the bolts 9 the work is complete and the middle section, withits blades, is in working position. Then in removing the middle sectionB, with its blades, I leave the end sections both in their bearings andundisturbed, and itis only necessary to take off the locking-heads E ateach end and at once the said middle section is ready to be lifted out.Of course a special clip or fastening for thesejointscould be used inlieu of the blade-fastenings, but I prefer to employ the heads of thestirrer-blades for this purpose and make them perform a double office.In thisinstancel showamiddle-shaft section angular in cross-section,which is the preferred form; but this is not necessary, and hence thejoint could be made by omitting the head I) and using a shaft which iscylindrical throughout. In that case a spline or other means would berequired to prevent rotation of the blades on the shaft. It will also benoticed that the body orcasingAhas holes in its sides through which theshaft extends, which, however, are suitably packed or otherwiseprotected to prevent leakage at this point.

What I claim is-- 1. A sectional shaft for a mixer havingstirring-blades provided with flanged heads and fastenings, said headsadapted to completely overlap the joints of the sections and fasten themtogether, substantially as described.

2. A shaft consisting of three several sections locked together at theirends, a series of stirrer-blades fixed to the middle section, andfastcnings overlapping the joints where cation this 8th day of March,1899.

WILL M. CUMMER. \Vitnesses:

H. E. MUDRA, R. B. MOSER.

